differential gap

16 LETTERS · STARTS WITH D

differential gap is a valid 16-letter word worth 25 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1F4F4E1R1E1N1T1I1A1L1G2A1P3

2 + 1 + 4 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 3 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does differential gap mean?